Set "OS type" to "Windows" and "Version" to "Microsoft Windows Server 2008"

In next dialog check "Customize configuration before install"

In the list on left side select "Disk 1" and under "Advanced options" change "Storage format" to "qcow2"

(optional) If you want to connect to AD from physical network, then select appropriate (physical) "Source device" under "NIC"

Click on "Begin Installation" button

The new VM will be started automatically.

The first start

Be patient. Windows will start after few minutes. You has to go through Next-Next-Finish wizard with language and license.

After the licence wizard you will be forced to change password for "Administrator". It has to contain at least 6 characters from at least three character classes. Password "ADMIN4lab" should work. Important note: Passwords for computer Administrator and Active Directory administrator are not same.